Final answer:
The false statement about the circulatory system is that 'Blood in the pulmonary veins is deoxygenated,' as pulmonary veins actually carry oxygenated blood from the lungs back to the heart.
Step-by-step explanation:
The question is asking which statement about the circulatory system is false. Regarding the options provided:
- Blood in the pulmonary vein, and inferior vena cava, is deoxygenated.
- Blood in the pulmonary artery and aorta is oxygenated.
The correct answer is, 'Blood in the pulmonary veins is deoxygenated' is the false statement. In reality, the pulmonary veins carry oxygenated blood from the lungs to the left atrium of the heart. The inferior vena cava carries deoxygenated blood from the body to the right atrium, and the pulmonary artery carries deoxygenated blood from the right ventricle to the lungs. The aorta is the blood vessel which carries oxygenated blood from the left ventricle towards the rest of the body.